Used in peptide synthesis as a protected intermediate, particularly in the preparation of complex peptides where the pyroglutamic acid residue needs to be masked during coupling steps. The Boc (tert-butoxycarbonyl) group provides acid-labile protection, allowing selective deprotection under mild acidic conditions without affecting other sensitive functional groups. The methyl ester facilitates solubility and handling in organic solvents commonly used in solid-phase or solution-phase peptide assembly. This compound is valuable in pharmaceutical research for constructing biologically active peptides, including hormones and enzyme inhibitors.